Deterioration of Reinforced Concrete: A Fracture Mechanics Approach

钢筋混凝土的劣化：断裂力学方法

• 批准号: 0070051
• 负责人: Victor Saouma
• 金额: $ 12.78万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-15 至 2003-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0070051&HistoricalAwards=false
• 关键词: Deterioration; Reinforced; Concrete; Fracture; Mechanics

The aim of this research is to develop a rigorous numerical model (primarily based on nonlinear fracture mechanics) to study thedeterioration of reinforced concrete structures (such as bridge decks)due to the corrosion of rebars, atmospheric pollution, frost and mechanical load.Coupling between these various effects with cracking will be considered.This in turn, will lead to the better understanding of the deterioration process,and improved predictive capabilities.Rather than focusing on the causes of the deteriorations (such as chloridediffusion, carbonation), we will focus on the end effect which is concrete cracking and its interaction/coupling with the mechanisms which lead to deterioration.

本研究的目的是建立一个严格的数值模型（主要基于非线性断裂力学）来研究钢筋混凝土结构的劣化（如桥面）由于钢筋腐蚀、大气污染、霜冻和机械荷载而产生的破坏。将考虑这些各种影响与开裂之间的耦合。这反过来又会导致更好地理解破坏过程，和提高预测能力。而不是专注于恶化的原因（如氯化物扩散，碳化），我们将专注于最终效果，这是混凝土开裂及其相互作用/耦合的机制，导致恶化。